CN104043258B - A kind of evaporimeter liquid distribution trough - Google Patents
A kind of evaporimeter liquid distribution trough Download PDFInfo
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- CN104043258B CN104043258B CN201410287277.7A CN201410287277A CN104043258B CN 104043258 B CN104043258 B CN 104043258B CN 201410287277 A CN201410287277 A CN 201410287277A CN 104043258 B CN104043258 B CN 104043258B
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- distribution trough
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- 238000009826 distribution Methods 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 title claims abstract description 67
- 238000001704 evaporation Methods 0.000 claims abstract description 53
- 230000008020 evaporation Effects 0.000 claims abstract description 53
- 239000000463 material Substances 0.000 claims description 22
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- -1 ether imines Chemical class 0.000 claims description 5
- 229920002492 poly(sulfone) Polymers 0.000 claims description 5
- 229920000570 polyether Polymers 0.000 claims description 5
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 5
- 150000003568 thioethers Chemical class 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000011552 falling film Substances 0.000 description 7
- 230000005484 gravity Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 238000010438 heat treatment Methods 0.000 description 2
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- 238000009827 uniform distribution Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a kind of evaporimeter liquid distribution trough, the newel in evaporator evaporation pipe and the distribution grid being connected to newel bottom is inserted into downwards when comprising use, the diameter of distribution grid end face and the equal diameters of newel bottom surface, the outer of newel is arranged with the cylinder be set in evaporation tube, the axis of cylinder and the dead in line of newel, connection gusset cylinder and newel linked together is provided with between cylinder and newel, between newel and cylinder, there is gap, the upper end of cylinder connects journal stirrup, the wall of cylinder from top to bottom thickness reduces gradually.The present invention in use liquid vertically can enter in cylinder from the gap between newel and cylinder, be evenly distributed on the inwall of cylinder or evaporation tube through distribution grid, because the thickness of cylinder wall reduces gradually, therefore the uniform flowing liquid membrane of one deck can be formed on the inwall of evaporation tube during downward liquid flow, evaporator heat exchange efficiency can be effectively improved.
Description
Technical field
The present invention relates to a kind of evaporimeter liquid distribution trough, particularly relate to a kind of liquid distribution trough that can be applicable in falling film evaporator, belong to heat exchange evaporation equipment technical field.
Background technology
Falling film evaporator is a kind of evaporimeter efficiently, and because it has, heat transfer coefficient is high, the heating material time is short, heat transfer temperature loss is little, be easy to the process advantage such as heat sensitive material and economize energy and be widely used in chemical industry, medicine, food, metallurgy, light industry and the field of industrial production such as desalinization, sewage disposal.The operation principle of falling film evaporator is that pending material is pumped into evaporator heating chamber top, after liquid distribution trough uniform distribution, by the gravity of self, material is along the vertical film-like of evaporation tube inner surface Uniform Flow from top to bottom, steam outside pipe passes to material by the form of convection current and conduction heat, the indirect steam that material produces at thermal histories flows with very fast speed from top to bottom in pipe together with material, liquid-vapor mixture spontaneous evaporation pipe lower end is flowed out, enter separation chamber subsequently and carry out vapor-liquid separation, complete evaporation process.In order to make liquid can be distributed to uniformly in every root evaporation tube, and can uniform liquid film being formed when liquid is flowed along evaporation tube inwall under the effect of gravity and indirect steam from top to bottom, just must liquid distribution trough being set.
In falling film evaporation process, only form the liquid film evenly declined on the surface of evaporator evaporation inside pipe wall, could effectively conduct heat, liquid film is more thin more even, and heat-transfer effect is better.If feed liquid skewness, there is bias current or channel in the liquid film entering each evaporation tube, liquid film can not cover wetting for the inwall of whole evaporation tube, the liquid film in pipe is caused to interrupt or evaporate to dryness, on the one hand effective heat transfer area can be made to reduce, will the wall temperature of evaporation tube be raised rapidly on the other hand, thus cause scale-forming ion in feed liquid to separate out or stick to formation on tube wall scabbing or fouling, further reduction heat transfer coefficient, makes evaporation efficiency decline.Therefore, for ensure feed liquid in every root evaporation tube even cloth film with prevent fouling, functional, not susceptible to plugging liquid distribution trough must be had.
Notification number is CN202666436U, name is called in the Chinese utility model patent of " falling film evaporator of liquid distribution trough and carrying liqs distributor " and discloses a kind of liquid distribution trough, this liquid distribution trough comprises the baffle be supported on falling film evaporator tube sheet, the support component for supporting baffle is provided with between baffle and tube sheet, thus make, between baffle and tube sheet, there is gap, this gap forms the feed pathway entering evaporation tube for liquid, the center of baffle is inserted into the newel in evaporation tube when being also provided with use, the lower end of newel is provided with the distribution grid in up-small and down-big truncated cone-shaped structure, the diameter of this distribution grid end face and the equal diameters of newel bottom surface.The feed pathway of this liquid distribution trough is arranged on evaporation tube both sides, and the surrounding concave surface along baffle when liquid enters flows to evaporation tube inner surface with radial line, and suspended solid can be avoided like this to deposit at heat exchanger tube sheet place.But this liquid distribution trough can only make liquid flow in the horizontal direction in evaporation tube, in use just must by liquid spray on tube sheet, liquid could flow in evaporation tube from the gap between baffle and tube sheet.
Summary of the invention
The object of the present invention is to provide and a kind ofly can not only liquid can also be made vertically to flow into evaporimeter liquid distribution trough in evaporation tube by Uniform Flow cloth film.
The present invention adopts following technical scheme: a kind of evaporimeter liquid distribution trough, the newel in evaporation tube is inserted into downwards when comprising use, the bottom of this newel is connected with the distribution grid in up-small and down-big Rotary-table structure, the diameter of this distribution grid end face and the equal diameters of newel bottom surface, the outer of described newel is arranged with the cylinder be set in evaporation tube, the axis of described cylinder and the dead in line of newel, connection gusset cylinder and newel linked together is provided with between described cylinder and newel, between described newel and cylinder, there is gap, the upper end of cylinder is connected with for being supported on the journal stirrup that tube sheet coordinates with tube sheet block, the wall of described cylinder from top to bottom thickness reduces gradually.
Described cylinder is divided into four sections of stack shells from top to bottom, and the internal diameter of these four sections of stack shells increases from top to bottom successively.
The quantity of described connection gusset is at least two, and each gusset that connects is evenly distributed between cylinder and newel, and the shape of described connection gusset is rectangle or triangle or trapezoidal.
Described newel is cylindrical structure or up-small and down-big Rotary-table or up-small and down-big conical structure.
External diameter 0.1 ~ the 10mm less of the internal diameter of evaporation tube of described cylinder.
The bus of the distribution grid of described Rotary-table structure and the angle of bottom surface are 45 ° ~ 60 °.
Described journal stirrup is circular or oval or semicircle or half elliptic or rectangular configuration.
Described cylinder, newel and connection gusset are linked together by bonding or slot or the shaping mode of unitary, injection-molded.
Described distribution grid and newel are by bonding or slot or be threaded or mode that unitary, injection-molded is shaping links together.
Described cylinder is made up of the plastic material such as polysulfone material or polyphenyl thioether material, and described newel, connection gusset and distribution grid are made up of plastic materials such as polyethers ether imines or polyphenyl thioether materials.
The invention has the beneficial effects as follows: newel is arranged in cylinder by connecting gusset by the present invention, under the effect of journal stirrup, liquid distribution trough of the present invention is stuck on tube sheet, during use, liquid vertically can enter in cylinder from the gap between newel and cylinder, be evenly distributed on the inwall of cylinder or evaporation tube through distribution grid, inwall under gravity along evaporation tube evenly declines, because the thickness of cylinder wall reduces gradually, also just say that the internal diameter of cylinder increases gradually, therefore can form one deck during downward liquid flow to flow uniformly thin liquid film on the inwall of evaporation tube.When implementing, in order to obtain different flows, can by changing the area of annular space between cylinder and newel, and the annular space area between distribution grid and cylinder or evaporation tube internal diameter realizes.
Further, four sections of stack shells that cylinder is divided into internal diameter to increase successively from top to bottom, are conducive to uniform liquid distribution, can form one deck and flow uniformly thin liquid film during such downward liquid flow on evaporation tube inwall.
Further, what the connection gusset be evenly distributed between cylinder and newel enable newel firm is connected on cylinder.
Further, up-small and down-big newel is conducive to uniform liquid distribution, further makes liquid on evaporation tube inwall, form the uniform liquid film of one deck.
Further, the external diameter of cylinder is conducive to uniform liquid distribution than the little 0.1 ~ 10mm of the internal diameter of evaporation tube.
Further, the bus of distribution grid and the angle of bottom surface are 45 ° ~ 60 ° liquid can be made to reach reasonable distributed effect.
Further, journal stirrup can adopt various shape and structure, makes the present invention be convenient to processing and manufacturing.
Further, cylinder, newel and connection gusset can link together in several ways, make the present invention be convenient to processing and manufacturing.
Further, distribution grid and newel can link together in several ways, make the present invention be convenient to processing and manufacturing.
Further, because the materials such as polysulfones, polyethers ether imines, polyphenylene sulfide have good heat endurance, at high temperature ageing-resistant performance is good, is highly suitable for manufacturing all parts of the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2;
Fig. 3 is the structural representation of the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment 1:
The structure of the embodiment of the present invention 1 as shown in Figure 1, the evaporimeter liquid distribution trough of the present embodiment is inserted into the newel 2 in evaporation tube 7 downwards when comprising use, this newel 2 is cylindrical structure, the bottom of this newel 2 is connected with the distribution grid 4 in up-small and down-big Rotary-table structure, the bus of the distribution grid 4 of Rotary-table structure and the angle of bottom surface are α, the diameter of this distribution grid 4 end face and the equal diameters of newel 2 bottom surface, the outer of described newel 2 is arranged with the cylinder 6 be set in evaporation tube, the axis of described cylinder 6 and the dead in line of newel 2, the connection gusset 3 cylinder 6 and newel 2 linked together is provided with between described cylinder 6 and newel 2, gap is left between described newel 2 and cylinder 6, the upper end of cylinder 6 is connected with for being supported on the journal stirrup 5 that tube sheet 8 coordinates with tube sheet 8 block, the wall of described cylinder 6 from top to bottom thickness reduces gradually, the cylinder 6 of the present embodiment is divided into four sections of stack shells from top to bottom, as shown in Figure 1, these four sections of stack shells are respectively L1, L2, L3, L4, the internal diameter of these four sections of stack shells increases from top to bottom successively.Cylinder 6, the newel 2 of the present embodiment are all adopt the mode of one casting to link together with being connected gusset 3 and distribution grid 4 and newel 2.
Newel is arranged in cylinder by connecting gusset by the present embodiment, under the effect of journal stirrup, liquid distribution trough is stuck on tube sheet, during use, liquid vertically can enter in cylinder from the gap connected between gusset and cylinder, be evenly distributed on the inwall of cylinder or evaporation tube through distribution grid, inwall under gravity along evaporation tube evenly declines, because the thickness of cylinder wall reduces gradually, also just say that the internal diameter of cylinder increases gradually, therefore can form one deck during downward liquid flow and flow uniformly thin liquid film on the inwall of evaporation tube.
The liquid distribution trough of the present embodiment can realize best distributed effect by the multiple parameter such as size, the length of newel, the length of each section of stack shell changing distribution grid angle [alpha]; By changing annular space area, the distribution grid between cylinder and newel) and annular space area between cylinder body or evaporation tube internal diameter realize Flow-rate adjustment.Therefore, the present embodiment is suitable for the operational requirements of different falling film evaporator, thus meets the requirement of different feed liquid and evaporation intensity.
Embodiment 2:
The structure of the embodiment of the present invention 2 as shown in Figure 2, the evaporimeter liquid distribution trough of the present embodiment is inserted into the newel 2 in evaporation tube downwards when comprising use, this newel 2 is cylindrical structure, the bottom of this newel 2 is connected with the distribution grid 4 in up-small and down-big Rotary-table structure, the diameter of this distribution grid 4 end face and the equal diameters of newel 2 bottom surface, the bus of the distribution grid 4 of Rotary-table structure and the angle of bottom surface are 45 °, the outer of described newel 2 is arranged with the cylinder 6 be set in evaporation tube 7, external diameter 1 mm less of the internal diameter of evaporation tube 7 of cylinder 6, the axis of described cylinder 6 and the dead in line of newel 2, the connection gusset 3 cylinder and newel linked together is provided with between described cylinder 6 and newel 2, gap is left between described newel 2 and cylinder 6, the upper end of cylinder 6 is connected with for being supported on the journal stirrup 5 that tube sheet 8 coordinates with tube sheet 8 block, the wall of described cylinder 6 from top to bottom thickness reduces gradually, the cylinder 6 of the present embodiment is divided into two sections of stack shells from top to bottom, as shown in Figure 2, these two sections of stack shells are respectively L21 and L22, the internal diameter of these two sections of stack shells increases from top to bottom successively.Cylinder in the present embodiment is made up of polysulfone material, and newel, connection gusset and distribution grid are made up of polyethers ether imines material.The cylinder of the present embodiment, newel and connection gusset and distribution grid and newel are all adopt the mode of one casting to link together.
The present embodiment can realize best distributed effect by changing the parameter such as the length of newel, the length of each section of stack shell; By changing annular space area, the distribution grid between cylinder and newel) and annular space area between cylinder body or evaporation tube internal diameter realize Flow-rate adjustment.
Embodiment 3:
The structure of the embodiment of the present invention 3 as shown in Figure 3, the evaporimeter liquid distribution trough of the present embodiment is inserted into the newel 2 in evaporation tube 7 downwards when comprising use, this newel 2 is up-small and down-big conical structure, the bottom of this newel 2 is connected with the distribution grid 4 in up-small and down-big Rotary-table structure, the diameter of this distribution grid 4 end face and the equal diameters of newel 2 bottom surface, the bus of the distribution grid 4 of Rotary-table structure and the angle of bottom surface are 60 °, the outer of described newel 2 is arranged with the cylinder 6 be set in evaporation tube 7, external diameter 3 mms less of the internal diameter of evaporation tube 7 of cylinder 6, the axis of described cylinder 6 and the dead in line of newel 2, the connection gusset 3 cylinder and newel linked together is provided with between described cylinder 6 and newel 2, gap is left between described newel 2 and cylinder 6, the upper end of cylinder 6 is connected with for being supported on the journal stirrup 5 that tube sheet 8 coordinates with tube sheet 8 block, the wall of described cylinder 6 from top to bottom thickness reduces gradually, the cylinder 6 of the present embodiment is divided into three sections of stack shells from top to bottom, as shown in Figure 3, these three sections of stack shells are respectively L31, L32 and L34, the internal diameter of these two sections of stack shells increases from top to bottom successively.Cylinder in the present embodiment, newel, connection gusset and distribution grid are made by polyphenyl thioether material.The cylinder of the present embodiment, newel and connection gusset and distribution grid and newel are all adopt the mode of one casting to link together.
The present embodiment can realize best distributed effect by changing the parameter such as the length of newel, the length of each section of stack shell; Flow-rate adjustment is realized by the annular space area between annular space area, distribution grid and the cylinder body between change cylinder and newel or evaporation tube internal diameter.
The present invention in the specific implementation, the quantity connecting gusset can be two or more, during concrete enforcement, the quantity connecting gusset is best with 2 ~ 4, each connection gusset is evenly distributed between cylinder and newel, connects the shape of gusset and can adopt rectangle or triangle or trapezoidal; Journal stirrup can adopt arbitrary shape and the structure of circle or ellipse or semicircle or half elliptic or rectangle, as long as cylinder can be made to be supported on tube sheet.
Above-described embodiment is several preferred embodiment of the present invention, and in other embodiments of the invention, distribution grid and newel can also be linked together by bonding or slot or the mode be threaded; Cylinder, newel and connection gusset can also be linked together by the mode of bonding or slot.
In other embodiments of the invention, the external diameter of cylinder can be than the little 0.1 ~ 10mm of the internal diameter of evaporation tube between an arbitrary value.
In other embodiments of the invention, cylinder can also adopt the structure of one-part form, can also adopt the structure of more than four sections, and the hop count of cylinder stack shell can be arranged according to actual needs.
In other embodiments of the invention, the bus of the distribution grid of Rotary-table structure and the angle of bottom surface can be arbitrary values between 0 ~ 90 °, and preferably, this angle can adopt a value between 45 ° ~ 60 °.
In other embodiments of the invention, newel can also adopt up-small and down-big Rotary-table structure.
In other embodiments of the invention, cylinder can also be made up of the plastic material such as polysulfone material or polyphenylene sulfide, and newel, connection gusset and distribution grid can also be made up of plastic materials such as polyethers ether imines or polyphenylene sulfides; Distribution grid, cylinder, newel and connection gusset can also adopt metal material or other nonmetal organic material to make, and certainly, the composite of metal and nonmetal formation can also be adopted to make.
What describe in above-described embodiment and description just illustrates basic structure of the present invention and principle; those skilled in the art should understand; the present invention is not restricted to the described embodiments; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and application claims protection domain is defined by the content that claims are claimed.
Claims (10)
1. an evaporimeter liquid distribution trough, the newel (2) in evaporation tube in evaporimeter (7) is inserted into downwards when comprising use, the bottom of this newel (2) is connected with the distribution grid (4) in up-small and down-big Rotary-table structure, the equal diameters of the diameter of this distribution grid end face and newel (2) bottom surface, it is characterized in that: the outer of described newel (2) is arranged with the cylinder (6) be set in evaporation tube (7), the axis of described cylinder (6) and the dead in line of newel (2), the connection gusset (3) cylinder and newel linked together is provided with between described cylinder (6) and newel (2), between described newel (2) and cylinder (6), there is gap, the upper end of cylinder (6) is connected with for being supported on the upper journal stirrup (5) coordinated with tube sheet block of tube sheet (8), the wall of described cylinder (6) from top to bottom thickness reduces gradually.
2. a kind of evaporimeter liquid distribution trough according to claim 1, is characterized in that: described cylinder (6) is divided into four sections of stack shells from top to bottom, and the internal diameter of these four sections of stack shells increases from top to bottom successively.
3. a kind of evaporimeter liquid distribution trough according to claim 1, it is characterized in that: the quantity of described connection gusset (3) is at least two, each connection gusset (3) is evenly distributed between cylinder (6) and newel (2), and the shape of described connection gusset (3) is rectangle or triangle or trapezoidal.
4. a kind of evaporimeter liquid distribution trough according to claim 1, is characterized in that: described newel (2) is cylindrical structure or up-small and down-big Rotary-table or up-small and down-big conical structure.
5. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, is characterized in that: the external diameter 0.1 ~ 10mm less of the internal diameter of evaporation tube of described cylinder (6).
6. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, is characterized in that: the bus of distribution grid (4) of described Rotary-table structure and the angle of bottom surface are 45 ° ~ 60 °.
7. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, is characterized in that: described journal stirrup (5) is circular or oval or semicircle or half elliptic or rectangular configuration.
8. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, is characterized in that: described cylinder (6), newel (2) be connected gusset (3) and linked together by bonding or slot or the shaping mode of unitary, injection-molded.
9. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, is characterized in that: described distribution grid (4) and newel (2) are by bonding or slot or be threaded or mode that unitary, injection-molded is shaping links together.
10. a kind of evaporimeter liquid distribution trough according to Claims 1-4 any one, it is characterized in that: described cylinder (6) is made up of polysulfone material or polyphenyl thioether material, described newel (2), connection gusset (3) and distribution grid (4) are made up of polyethers ether imines or polyphenyl thioether material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410287277.7A CN104043258B (en) | 2014-06-25 | 2014-06-25 | A kind of evaporimeter liquid distribution trough |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410287277.7A CN104043258B (en) | 2014-06-25 | 2014-06-25 | A kind of evaporimeter liquid distribution trough |
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| CN104043258A CN104043258A (en) | 2014-09-17 |
| CN104043258B true CN104043258B (en) | 2015-09-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105797410B (en) * | 2016-04-14 | 2018-02-16 | 中国科学院工程热物理研究所 | A kind of multichannel extratubal falling film liquid distributor and heat-exchange apparatus |
| CN107175049B (en) * | 2017-05-27 | 2023-04-14 | 天津九源化工工程有限公司 | Liquid distributor for mass transfer tower |
| CN107754362A (en) * | 2017-11-02 | 2018-03-06 | 叶春穗 | MVR multi-effect evaporators |
| CN109157856B (en) * | 2018-09-25 | 2024-06-04 | 上海三耕储节能环保科技有限公司 | Film tube type falling film evaporator |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1214199B (en) * | 1963-10-08 | 1966-04-14 | Metallgesellschaft Ag | Device for fastening vertically arranged shafts on which rotating fluid distributors are fastened |
| IT1131270B (en) * | 1980-06-05 | 1986-06-18 | Snam Progetti | IMPROVEMENT OF THE EQUIPMENT FOR THE DISTRIBUTION OF LIQUID IN THE FORM OF FILM INSIDE VERTICAL PIPES |
| CN2159251Y (en) * | 1993-06-14 | 1994-03-23 | 徐尧润 | Liquid distributor with equalizing plate |
| FI97694C (en) * | 1994-09-27 | 1997-02-10 | Hadwaco Ltd Oy | Liquid distributor for an evaporator |
| FI98496C (en) * | 1995-08-22 | 1997-07-10 | Hadwaco Ltd Oy | Liquid distributor in an evaporator |
| JPH10118401A (en) * | 1996-10-23 | 1998-05-12 | Nippon Sanso Kk | Falling film evaporator |
| CN2765649Y (en) * | 2004-11-19 | 2006-03-22 | 上海爱普香料有限公司 | Arrangement for evenly distributing liquid material |
| CN102266675A (en) * | 2011-07-22 | 2011-12-07 | 常熟市龙宇化工设备有限公司 | Shell-and-tube falling film evaporator |
| CN203469505U (en) * | 2013-10-15 | 2014-03-12 | 重庆山巨化工机械有限公司 | Efficient liquid distributing device and falling film evaporator thereof |
| CN203899180U (en) * | 2014-06-25 | 2014-10-29 | 江苏中圣高科技产业有限公司 | Liquid distributor for evaporator |
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